We aim for at least 2, preferably 3 feeds a week.
Thats my wife and our 2 teenagers, we'd deck a kilo of fillet each feed easy.
Then down the road we have our daughter and her 2 pre-schoolers, its always nice to give them a feed as well.
Never a problem with over-supply, when we've got enough, I don't fish again until its all gone.
Simple, but that's my personal ethic.
I love to fish so it does take quite a bit of self discipline, but given that I prefer to fish at night, it isn't that hard to just stay in bed!
Cheers.